/*
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* Copyright (C) 2015 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <cutils/sockets.h>
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#include <errno.h>
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#define LISTEN_BACKLOG 4
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extern bool initialize_windows_sockets();
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SOCKET socket_inaddr_any_server(int port, int type) {
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if (!initialize_windows_sockets()) {
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return INVALID_SOCKET;
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}
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SOCKET sock = socket(AF_INET6, type, 0);
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if (sock == INVALID_SOCKET) {
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return INVALID_SOCKET;
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}
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// Enforce exclusive addresses so nobody can steal the port from us (1),
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// and enable dual-stack so both IPv4 and IPv6 work (2).
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// (1) https://msdn.microsoft.com/en-us/library/windows/desktop/ms740621(v=vs.85).aspx.
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// (2) https://msdn.microsoft.com/en-us/library/windows/desktop/bb513665(v=vs.85).aspx.
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int exclusive = 1;
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DWORD v6_only = 0;
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if (setsockopt(sock, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char*)&exclusive,
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sizeof(exclusive)) == SOCKET_ERROR ||
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setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&v6_only,
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sizeof(v6_only)) == SOCKET_ERROR) {
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closesocket(sock);
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return INVALID_SOCKET;
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}
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// Bind the socket to our local port.
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struct sockaddr_in6 addr;
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memset(&addr, 0, sizeof(addr));
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addr.sin6_family = AF_INET6;
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addr.sin6_port = htons(port);
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addr.sin6_addr = in6addr_any;
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if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) == SOCKET_ERROR) {
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closesocket(sock);
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return INVALID_SOCKET;
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}
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// Start listening for connections if this is a TCP socket.
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if (type == SOCK_STREAM && listen(sock, LISTEN_BACKLOG) == SOCKET_ERROR) {
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closesocket(sock);
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return INVALID_SOCKET;
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}
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return sock;
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}
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